/*
 * Copyright (c) 2012 Your File System Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include <afsconfig.h>
#include <afs/param.h>

#include <roken.h>

#include "dict.h"

static_inline int
isPowerOf2(int value)
{
    return value && !(value & (value -1));
}

struct opr_dict *
opr_dict_Init(unsigned int size)
{
    struct opr_dict *dict;
    int i;

    if (!isPowerOf2(size))
	return NULL;

    dict = calloc(1, sizeof(struct opr_dict));
    dict->size = size;

    dict->table = malloc(dict->size * sizeof(struct opr_queue));
    for (i = 0; i < dict->size; i++) {
	opr_queue_Init(&dict->table[i]);
    }

    return dict;
}

void
opr_dict_Free(struct opr_dict **dict)
{
    free((*dict)->table);
    free(*dict);
    *dict = NULL;
}